Abstract: Aiming at the problem that the clarity of some regions processed by traditional wavelet transform fusion method based on directional contrast is not high enough, some improvement with respect to the processing method of high and low frequency components have been achieved. For the sake of enhancing the detailed information of the images, the Tenunbaum gradient has been brought in. Experimental results show that edges of the fusion results are clearer by this means, and more information has been reserved by the way.

Key words: wavelet transform, directional contrast, image fusion, quality evaluation